Figure 14.

(a) FTIR spectra of THE P4HB suture with labelling of main bands; (b) Optical polarized micrographs showing spherulites developed in a solvent casting film. Insets show the chemical image obtained from C=O and CH₂ (shoulder) bands; (c) Micrographs showing a representative banded spherulite and the specific microdomains were FTIR spectra were recorded; (d) Microinfrared spectra taken from the indicated microdomains (keeping the colour code). Different magnifications and wavenumber regions are showed.